Hand set-up carton



March 14, 1961 v, sw Nso 2,974,849

HAND SET-UP CARTON Filed March 24, 1959 3 Sheets-Sheet l Jar x rar Ls ze 9 2/ 24 ENTOR 47 72 47 BY 46mm. (JOFFLoccs 6. ATTORNEY March 14, 1961 v, E, SWANSON HAND SET-UP CARTON 3 Sheets-Sheet 2 Filed March 24, 1959 EARL, b2. Locus ATTORNEY March 14, 1961 v. E. SWANSON HAND SET-UP CARTON 3 Sheets-Sheet 3 Filed March 24, 1959 m m M M51 ,XW

BY Emu. LUFFLOCICS ATTORNEY United States Patent HAND SET-UP CARTON Vernon E. Swanson, Chicago, 11]., assignor to Diamond National Corporation, a corporation of Delaware Filed Mar. 24, 1959, Ser. No. 801,542

14 Claims. (Cl. 229-28) The present invention relates to a paperboard egg carton of the set-up type, and more particularly to such an egg carton that is readily adapted to beset up by hand.

The marketing of eggs generally involves the packaging of the eggs in a protective carton holding one dozen eggs. Cartons of this type, made of paperboard, have long been known and are widely used. In one phase in the marketing operation, the eggs are packed by the egg producer in cases holding thirty dozen eggs each, the eggs being placed in layers in the cases between filler flats. Upon arrival at an egg packaging room, they are placed into the egg cartons. Conventionally, the egg cartons, which are of the paperboard type, are shipped to the egg room in the fiat or knocked-down condition in order to conserve expensive shipping space.

Set-up machinery is generally provided in the egg room, and this machinery serves to set up or erect the cartons from the knocked-down condition in which they are received. Typically, there is provided both automatic carton set-up machines and hand-operated carton set-up machines, the latter generally being used in the event of power failure or other non-functioning of the automatic machinery.

In some instances, the egg producer is desirous of selling his eggs directly to the consumer, thus by-passing the marketing operations of the egg room and the retail outlet. In such instances, the egg producer must furnish the eggs in a protective carton, and is therefore faced with the necessity of erecting paperboard cartons that are furnished to him in the knocked-down condition.

It will be understood that the paperboard cartons that are constructed to be set up by machinery are extremely difficult to set up by hand, and the hand set-up of a carton intended to be set up by machinery is an arduous task. Such cartons, when set up by hand, generally appear to be somewhat mangled and shopworn, thus decreasing their sales appeal, as well as being extremely expensive, from a point of view of time consumed in their erection. When cartons have been provided in the past for a hand set-up operation, they have generally been somewhat diflicult to set up, have been expensive and/ or have not been sufiiciently strong when set up.

An object of the present invention is the provision of a paperboard egg carton that can be readily set up by hand from the knocked-down condition.

Another object of the present invention is to provide a paperboard egg carton that has parts connected for relative guiding movement during erection of the carton.

A further object of the present invention is the provision of a paperboard egg carton having guiding parts in engagement with each other when the carton is in the knocked-down condition.

A still further object of the present invention is to provide a paperboard egg carton having parts that enter into guiding relationship as the carton is erected.

Another object of the present invention is the provision of a paperboard egg carton that will cause .the breaking 2,974,849 Patented Mar. 14, 1961 of any undesired arrangement of parts during the erection of the carton.

Yet another object of the present invention is to provide a paperboard egg carton having a planar longitudinal partition shaped to support short transverse partitions in a substantially erect position.

Another object of the present invention is the provision of a paperboard egg carton constructed to receive large eggs without the use of relatively more paperboard.

Yet another object of the present invention is to provide an egg carton made from a single blank capable of achieving one or more of the foregoing objects.

Other objects and the nature and advantages of the instant invention will be apparent from the following description taken in conjunction with the accompanying drawings, wherein:

Fig. 1 is a plan view of the blank from which the carton of the present invention is made.

Fig. 2 is an end view of the carton of the present invention in the knocked-down condition.

Fig. 3 is an end view of the carton of the present invention while being erected by hand.

Fig. 4 is a perspective view of the carton in the partially erected condition shown in Fig. 3.

Fig. 5 is an end view of the carton in fully erected position, but before the transverse partitions have been rotated.

Fig. 6 is an end view of the carton after the transverse partitions have been rotated.

Fig. 7 is a plan view of the erected carton.

Fig. 8 is a cross-sectional view taken on the line 8-8 of Fig. 7.

Fig. 9 is a cross-sectional view taken on the line 99 of Fig. 7.

Referring now to the drawings, wherein like reference numerals are used to designate like or corresponding parts throughout the several views, there is shown in Fig. l a blank 15. It will he observed that blank 15 is rectangular in outline, and thus is of the shape that oifers the greatest possible economy. Blank 15 is cut and scored in a particular and novel way, and thereby comprises, in the form illustrated, a blank having two sideby-side units separated by the transversely extending division score line 16. As will be apparent from the following description, the carton erected from the blank 15 may be divided into two units each having six egg cells therein.

Blank 15 is divided into a series of flaps and panels, which are separated from each other by fold lines; some of the fold lines extend in an interrupted manner across the blank. There are provided in the blank 15, in order, a glue flap 17, a cross partition panel 18, a front-Wall panel 19, a bottom panel 20, a pair of longitudinal partition panels 21 and 22, a second bottom panel 23, a back Wall panel 24, a cover panel 25 and a tuck flap 26.

In each unit, there is provided in the cross partition panel 18 two full depth cross partitions 3i) and 31 having two shallow depth cross partitions 32 and 33 therehetween. The full depth partition 30 is severed from the glue flap 17 and the front wall panel 19 by cuts 34 and 35 extending from points 36 and 37 spaced a short distance inwardly from a lateral margin of the unit. Score lines 33 and 39 extend from the points 36 and 37, respectively, substantially transversely of the partition 30 for a distance approximately one-sixth of the width of the partition 30.

Spaced inwardly from the score line 16 are a pair of spaced arcuate cuts 41 and 42, and these cuts serve to define a lateral margin of the full depth cross partition 31. Partition 31 is also severed from the glue flap 17 and the front wall panel 19 by cuts 44 and 45 similar to the cuts 34 and 35. v

Each full depth partition 30' and 31 has a triangular aperture 46 therein, and these apertures are in the parts of the partitions 30 and 31 that become the upper part thereof whenthe partitions are rotated to, their final erected position. The full depth partitions 30; and 31 also have a pair of spaced extending lugs or, legs 47.

The shallow cross partitions 32-and 33 are separated from each other by a cut 50 thatlhereby provides a lateral margin for each of theshallow cross partitions; The lateral margins thus provided} extend transversely of the cross partition panel 18, and each of the shallow cross partitions 32 and 33.has an angled slot 52 and 53 therein, respectively. One leg of each of the angled slots 52 and 53 is substantially. perpendicular to, and interrupts, the lateral margin provided by the cut 50. The, perpendicuIarleg'SS of the slot 53 is olf-center with respect to the shallow cross partion 33, and the margin 56 of the leg. 55 of slot 53 lies approximately in the-center of said shallow partition.

Shallow partition 32 has a transversely-extending ear 57 at the transverse margin provided by cut 50, and as will be seen the ear 57 extends towards the. glue flap '17 and has its free end substantially in the center of the partition 32. r

The pair of longitudinal partition panels 21 and 22 have two units therein, one on either side of the perforated out line 16. In each unit, the longitudinal partition panels 21 and 22have a pair of generally C-shaped openings 60 and 61 therein, there being one such openingadjacent each end of the unit. The C-shaped openings 60 and 61 face outwardly of the unit, and each has a tab 62 and 63 therein, respectively. Cuts 64 and 65 in the tabs 62 and 63 extend from a margin of the tabs 7 to the fold line between the panels 21 and 22. A pair of" inwardly sloping noses 66 and 67 are cut from the panel 21, and are integral with the panel 22;, it being understood that the fold line between these two panels is interrupted. A hump 68 lies in the unit between the noses 66 and 67' and is'cut or severed from the panel 22; it being integral with the panel 21. Hump 68 has a hole 69 therein, and this hole is in alignment with the car 57. It will be understood, also, that the aforementioned tabs 62 and 63 are each in alignment with one of the triangular apertures 46.

The bottom panels 20 and 23 each has a'longitudinal slot 71 therein adjacent the lateral sides of a unit. Also, bottom panelv 20 has a plurality of feet 72 cut'therefrom, the. feet 72 being integral with the longitudinal partition panel 21. 7 Referring. now to Fig. 2, there may be seengthe various panels of the blank after the blank has had'glue appliedto the glue flap 17, and the glue flap 17 folded over andsecured to the back wall panel 24. Also, longitudinal partition panels 21 and 22 have had glue applied, thereto, and'have been secured together. Attention is. particularly invited to the hump 68 extending throughthecross partition pane118, and to the fact that the, blank hasbeen folded only at the fold line between panels 18 and 19, at the fold line between panels and 21, at the fold line between the panels 21 and 22, and at the fold line between panels 23 and 24. The fold line between panels 22 and 23 has not been subjected to a bending or folding action so that the fibers of which the paperboard material is made are still unstrained and unbroken, and thus have a relatively great resistance against bending in comparison to fibers in fold lines that have been subjected to abending action. It willbe understood that the configuration of the parts, as shown in Fig. 2, represents the carton after it, has been pulled apart slightly, this showing being made for purposes of clarity. In practice, after coming from the gluing and folding machine, the carton has the various panels thereof in contact with each other.

When it is desired to set up the carton of the present invention from the knocked-down. condition thereof shown in Fig. 2, the carton is grasped, as with the left hand, with the four fingers of the left hand on the fold line between panels 18 and 19, and with the thumb of the left hand on the fold line between the panels 23 and 24. As the fingers and thumb are contracted, the cross partition panel 18 is swung downwardly (see Fig. 3) on the fold line between it and the glue flap 17. Also, the bottom panel 20 rotates about the fold line and longitudinal partition panel 21, and the fold line between front wall panel 19 and bottom panel 20 is broken or flexed. Similarly, front wall panel 19 rotateswith respect to the fold line between it and cross partition panel 18. As the various rotational movements of these panels proceeds, with the .hump 68 extending upwardly. through the slots 52 and 53 of the shallow cross partitions 32 and 33, the ear 57 of shallow partition 32 will enter into the hole 69 in hump 68 This entry of ear 57 may be seen in both Figs. 3 and 4. Referring particularly to Fig. 4, it may be seen that anupstanding guiding point 73 formed from the tab 62, has entered into the triangular aperture 46 in the full depth cross partition 30.v Hence, it may be seen that when the carton is initially folded and glued, and is in the knocked-down condition, there is a guiding interrelationship between the hump 68 and the shallow cross partitions 32 and 33. As the erection of the carton proceeds, this guiding interrelationship is supplemented by the entry of' the, guiding point 73. into and, through the triangular aperture. 46 of the fulldepth partitionjiil.

As the contraction of the hand continues, the margins of slotsv 52' and 53 will engage with the face of hump 68 that is closest to the front wall 19, and the force thus transmitted to the'hump 68 will act as a couple with the force transmitted by the thumb, and will break the fold line between longitudinal partition panel 22 and bottom panel 23. It will be observed that the panels 22 and 23 had not previously been folded in relation to each other, and that these two panels formed a triangular structure with one-half of cross partition panel 18 and back wall panel 24, this triangle being readily seen in Fig. 3 and in Fig. 4. This triangle having been broken by the forces coming into play through the locking of ear 57 into aperture 69, the erection of the carton continues until the position shown in Fig. 5 is obtained. Thereafter, it is only necessary to rotate the various, cross partitions into substantially upright position in order to, obtain the fully set up carton. As will be understood, the legs 47 of the full depth cross partitions 30 and 31are rotated into locking engagement in the slots 71 in the bottom panels 20 and 2 3. V V V The fully set up carton maybe seen, in end elevation, in Fig. 6, and attention is. particularly, invited therein to the engagement of. the upper part of hump 68 with the 'under side of the cover 25. As will be, apparent, vertical crushing loads will be transmitted not-only through the front and back walls 19 and 17, respectively, but also through the hump 681 into the longitudinal. partition formed from the panels 21 and, 22,, and thence through the, feet 72; 1 I t The fully set up carton is shownin plan view in Fig. 7, and attention is particularly invitedlto the complex, curved hinge formations 74 which pivotally, connect. the full depth cross partition 30 with the front and back walls 19 and 17, respectively. As may be seen from Fig. 8, the lugs or legs 47 of the full depth, partition 30, are held by the slots 71, so that the partition. 30 has a generally arched or bowed configuration. There is thus provided a construction in which an unusually largeegg placed in the one of the other of the left. end cells shown in Fig. 7 will cause the partition 30 to yield slightly to accommodate it. This is due to the fact; that the partition 30 has no well defined hinge line or axis, there being. only a slight provision of a hinging action by the transverse scores 38and 39. a I

There'may also be seen'inFig. 8 the opening 69 which is arcuate in shape, adjacent the full depth partition 30 1 Jam-i to permit rotation thereof into the aforementioned bowed, and generally vertical position. The guiding point 73 may also be seen, and it will be understood that the guiding point 73 extends through the triangular apertures 46 in the partition 30. There may also be seen in Fig. 8 the upstanding hump 68 with the hole 69 therein. The shallow depth partitions 32 and 33 occupy planes on either side of hump 68, and are held in upright position by engagement with the noses 66 and 67, respectively. It will be appreciated that the partitions 32 and 33 are in fact each buttressed on either face thereof by the margin or edge of hump 68 and one or the other of the noses 66 and 67. The partition 32 will also be supported in upright position by engagement of the car 57 thereof against the rear face of the longitudinal partition, the car being slightly bent and thus exerting a force against the longitudinal partition, as may be seen in Fig. 9. Also, since the margin 56 of slot 53 of shallow partition 33 is substantially in the center of the partition 33, it will have a wedging engagement with the longitudinal partition.

Unusually large size eggs placed in the cells adjacent to full depth cross partition 31 will be well accommodated, due to the yielding of partition 31, due to one or the other of the arcuate cuts 41 and 42. These cuts provide space in the bridge member 75 (see Fig. 7) into which the cross partition 31 may be pushed by the egg.

There has been provided a blank for an egg carton that is made of an economical rectangular configuration and an egg carton that may be readily set up by hand. The carton in its knocked-down condition has certain parts thereof in interengagement, which greatly facilitates the erection of the carton by serving to guide various parts of the carton with respect to each other as the carton is erected by hand. In addition, the blank and carton are so shaped that an inherently triangular configuration is readily and automatically broken during the hand set-up operation, to thereby permit hand setting up of the carton easily and without the necessity of exerting undue strength.

The carton, when set up, is relatively strong, having a central longitudinal partition having parts to engage with the under side of the cover to thereby transmit vertical crushing loads through the longitudinal partition as well as through the front and back walls. Thus, the hand set-up carton of the present invention possesses relatively great strength.

Further, although the set-up carton of the present invention is made to a size to accommodate primarily those eggs classified as large, the end cells of each unit of six cells in the carton each has a partition defining the cell so connected with the front and back walls that the partition may yield to accommodate an egg which is extra large. 7

The full depth cross partitions of the set up carton are held in substantially vertical position, and the shallow cross partitions are held by sufiiciently positive engagement of parts that they will maintain a relatively upright position, so as to permit quick loading of the carton. In addition, the carton of the present invention is readily divisible, so that a unit thereof holding six eggs may be separated along a dividing perforated out line, to thus provide a six-egg unit possessing substantially all of the advantages of the full dozen egg carton.

It will be obvious to those skilled in the art that various changes may be made without departing from the spirit of the invention and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.

What is claimed is:

1. A blank for a paperboard egg carton comprising in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines,

said cross partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, one of said full depth partitions being severed from the glue flap and the front wall panel by cuts extending from a point spaced a short distance inwardly from a lateral margin of said unit, a score line extending from each said point substantially transversely of said full depth cross partition approximately one-sixth of the width of said full depth cross partition, the other of said full depth partitions having a lateral margin thereof comprising a pair of spaced arcuate cuts, each full depth partition having a triangular aperture in the upper part thereof and a pair of spaced extending lugs, said shallow cross partitions each having a lateral margin extending transversely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular and interrupting said lateral margin, said leg of one said shallow partition being 05 center with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross partitions having a transversely extending car at said shallow partition transverse margin extending towards said glue flap, said pair of longitudinal partition panels having at least one unit therein comprising a generally C-shaped opening adjacent each end thereof, said C-shaped openings each facing outwardly of, said unit and each having a tab centrally thereof, each said tab having a cut extending from a margin to the fold line between said longitudinal partition panels, a pair of inwardly sloping noses cut from a first longitudinal partition panel and integral with a second such panel and a relatively larger hump cut from the second panel and integral with the first such panel and lying in said unit between said noses, said tabs being in alignment with said triangular apertures and said hump being in alignment with said angled slots and having a hole therethrough in alignment with said ear, said bottom panels each having a transverse slot therein adjacent the lateral sides of said unit, and one of said bottom panels having a foot cut therefrom and integral with the adjacent longitudinal partition panel.

2. A blank for a paperboard egg carton comprising, in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit ofcross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, one of said full depth partitions being severed from the glue flap and the front wall panel by cuts extending from a point spaced a short distance inwardly from a lateral margin of said unit, a score line extending from each said point substantially transversely of said full depth cross partition, the other of said full depth partitions having a lateral margin thereof comprising a pair of spaced arcuate cuts, each full depth partition having a triangular aperture in the upper part thereof and a pair of spaced extending lugs, said shallow cross partitions each having a lateral margin extending transversely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular to and interrupting said lateral margin, said leg of one said shallow partition being off center with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross partitions having a transversely extending ear at said shallow partition transverse'margin extending towards said glue flap, said pair of longitudinal partition panels having at least one unit therein comprising a generally C-shaped opening adjacent each end thereof, said C- haped openings each facing outwardly of said unit and each having a tab centrally thereof, each said tab having a cut extending from a margin to the fold line between said longitudinalpartition panels, a pair of in.- wardly; sloping noses, cut from a first longitudinal partition panel and integral with a second such panel and'a relatively largerhump'cut from the second panel and integral with-the first such panel and lying in said unit between said noses, said tabs being in alignment with said triangular apertures and said hump, being in alignment with said angled slots and havinga hole therethrough in alignment with said ear, said bottom panels each having a transverseslottherein adjacent the lateral side ofsaid unit.

3-. A blank fora paperboard egg carton comprising, in order, a, glue flap, a cross partition panel, a front wall panel, a bottom panel, arpair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panelJand a tuck flap, all separated by fold lines, said cross, partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, onev of said full depth partitions having a lateral margin thereof comprising a pair of spaced arcuate cuts, each full depth partition having a triangular aperture in the upper part thereof and a pair of spaced extending lugs, said. shallow cross. partitions each having a lateral margin extending transversely of said cross partition panel and an, angled slot having one leg thereof substantially per pendicular to and interrupting said lateral margin, said leg of one said shallow partition being off center with respect to said oneshallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross partitions having a transversely extending ear at said shallow partition transverse margin extending towards said glue flap, said pair of longitudinal partition panels having at a least one unit therein comprising a generally C-shaped opening adjacent each end thereof, said C-shaped openings. each facing outwardly of said unitand each having a tab centrally thereof, each said tab having a cut extending from a margin to the fold line between said longitudinal partition panels, a pair of inwardly sloping noses cut from one panel of said pair of longitudinal partition panels and a relatively larger hump cutout from the other panel and lying in said unit, between said wings, said tabs being in alignment with said triangular aperturesandsaid hump being in alignment with said angled slots and having a hole therethrough in alignment with said ear, said bottom panels each having a transverse slot therein adjacent the lateral side of said unit.

4. A blank for a paperboard egg carton comprising, in order, a glue flap,'a cross partiton panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel; a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, one of said'full depth partitions being severed from the glue flap and the front wall panel by cuts extending from a point spaced a short distance inwardly from a lateral margin of said unit, a score line extending from each said point substantially transversely of said full depth cross partition, each full depth partition having a triangular aperture in the upper part thereof and a pair of spaced extending lugs, said shallow cross partitions each having a lateral margin extending transversely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular to and interrupting said lateral margin, saidlleg of one said shallow partition being offcenter with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross partitions having a transversely extending ear at said shallow partition transverse margin extending towards said glue flap, said pair of longitudinal partition panels having at least one unit thereincomprising a genhump cut from the second panel and integral with the first such panel and lying in said unit between saidnoses, said,

tabs being in alignment with said triangular apertures,

and said hump being in alignment with said angled slots and having a hole therethrough in alignment with said, ear, said bottom panels each having a transverse slot therein adjacent the lateral side of said unit.

5. A blank for a paperboard egg carton comprising in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel, and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross part-itions comprising two full depth cross partitionshaving two shallow depth cross partitions therebetween, each full depth partition having a triangular aperture in the upper part thereof and a pair of spaced extending lugs, said shallow cross partitions each having a lateral margin extending transversely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular to and interrupting said lateral margin, said leg of one said shallow partition being off center with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross partitions having a transversely extending ear at said shallow partition transverse margin extending towards said glue flap, said pair of longitudinal partition panels having at least one unit therein comprising a generally C-shaped opening adjacent each end thereof, said C-shaped openingseach facing outwardl-y of said unit and each having a tab centrally thereof, each said tab having a cut extending from a margin to the fold line between said longitudinal partition panels, a pair of inwardly sloping noses cut from a first longitudinal partition panel and integral with a second such pane and a relatively larger hump cut from the second panel and integral with the first such panel and lying in said unit between said noses, said tabs, being in alignment with said triangular apertures and said hump being in alignment with said angled slots and having a hole therethrough in alignment with said ear, said bottom panels each having a transverse slot therein adjacent the lateral side of, said unit.

6. A blank for a paperboard egg cartoncomprising, in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, said shallow cross partitions each having a lateral margin extending transversely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular to and interrupting said lateral margin, said leg of one of said shallow partition being off center with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said partition, the other of said cross partitions having a transversely extending ear at said shallow partition transverse margin extending towards said glue flap, a pair of inwardly sloping noses cut from a first longitudinal partition panel and integral with a second such panel and a relatively larger hump cut out from the second panel and integral with the first such panel and lying in said unit between said noses, said hump being in alignment with said angled slots and having a hole therethrough in alignment with said ear.

7. A blank for a paperboard egg carton comprising, in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a 1'. air of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, said shallow cross partitions each having a lateral margin extending transevrsely of said cross partition panel and an angled slot having one leg thereof substantially perpendicular to and interrupting said lateral margin, said leg of one said shallow partition being off center with respect to said one shallow cross partition and having a margin of said leg approximately in the center of said shallow partition, the other of said shallow cross'partitions having a transversely extending ear at said shallow partition transverse margin extending towards said glue flap, a hump cut out from one panel, said hump being in alignment with said angled slots and having a hole therethrough in alignment with said ear.

8. A blank for a paperboard egg carton comprising, in order, a glue flap, a cross partition panel, a front wall panel, a bottom panel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross partitions having two shallow depth cross partitions therebetween, said shallow cross partitions each havin a lateral margin extending transversely of said cross partition panel and a slot substantially perpendicular to said lateral margin, one of said shallow cross partitions having a transversely extending car at said shallow partition trmsverse margin extending towards said glue flap,

a bump cut from one longitudinal partition panel and integral with said other longitudinal partition panel and having a hole therethrough in alignment with said ear.

9. A blank for a paperboard egg carton comprising, in order, a glue flap, a cross partition panel, a front wall panel, a bottompanel, a pair of longitudinal partition panels, a second bottom panel, a back wall panel, a cover panel and a tuck flap, all separated by fold lines, said cross partition panel having at least one unit of cross partitions comprising two full depth cross partitions having two shallow depth cross partitions therebetween, each full depth partition having a triangular aperture in the upper part thereof, said pair of longitudinal partition panels having at least one unit therein comprising a generally C-shaped opening adjacent each end thereof, said C-shaped openings each facing outwardly of said unit and each having a tab centrally thereof, each said tab having a diagonal cut extending from a margin of said C-shaped openings to the fold line between said longitudinal partition panels, said tabs having a pointed portion offset from the fold line between said partition panels being in alignment with and directed towards said triangular apertures.

10. An egg carton made from a single blank of paperboard comprising at least one six-egg unit having a front, a back, a cover, a bottom, a planar longitudinal partition and cross partitions, there being a pair of spaced full depth cross partitions and a pair of shallow cross partitions therebetween pivotally connected to said front and back, each of said full depth partitions having a centrally positioned triangular aperture therein intermediate the height thereof and a pair of spaced, depending lugs that extend through slots in said bottom, one of said full depth partitions being pivoted to said front and back on a complex curved hinge formation, said longitudinal partition having arcuate openings therein adjacent said full depth partitions to permit rotation thereof from horizontal to generally vertical positions, a guiding point extending generally upwardly from said longitudinal position adjacent each of said arcuate openings and in registry with the triangular aperture in the adjacent full 1G e depth partition, said longitudinal partition comprising an upstanding hump of a single thickness of material rising between said shallow cross partitions and extending substantially to the underside of said cover, a pair of noses on said longitudinal partition extending toward said hump, each shallow cross partition lying between one of said noses and said hump and engaged on opposite sides thereof by said hump and nose, one of said shallow partitions having a slot therein receiving said longitudi nal partition and having a margin of said slot in engagement with one one side of said longitudinal partition, the other one of said shallow partitions having a slot therein receiving said longitudinal partition and having an ear extending partially across the bottom of said slot and into engagement with a side of said longitudinal partition, said hump having an opening therethrough with the bottom margin of said opening slightly above the pivotal connection of said shallow cross partitions, said opening being spaced from the hinge connection of the shallow partition having said car a distance substantially equal to the distance of said ear from the hinge connection of the partition of which it is a part.

11. An egg carton made from a single blank of paperboard comprising at least one six-egg unit having a front, a back, a cover, a bottom, a longitudinal partition and cross partitions, there being a pair of spaced full depth cross partitions and a pair of shallow cross partitions therebetween pivotally connected to said front and back, each of said full depth partitions having a pair of spaced, depending lugs that extend through slots in said bottom, one of said full depth partitions being pivoted to said front and back on a complex curved hinge formation, said longitudinal partition having arcuate openings therein adjacent said full depth partitions to permit rotation thereof from horizontal to generally vertical positions, said longitudinal partition comprising an upstanding hump of a single thickness of material rising between said shallow cross partitions and extending substantially to the underside of said cover, a pair of noses on said longitudinal partition extending toward said hump, each shallow cross partition lying between one of said noses and said hump and engaged on opposite sides thereof by said hump and nose, one of said shallow partitions having a slot therein receiving said longitudinal partition and having a margin of said slot in engagement with one side of said longitudinal partition, the other one of said shallow partitions having a slot therein receiving said longitudinal partition and having an ear extending partially across the bottom of said slot and into engagement with a side of said longitudinal partition, said hump having an opening therethrough with the bottom margin of said opening slightly above the pivotal connection of said shallow cross partitions, said opening being spaced from the hinge connection of the shallow partition having said ear a distance substantially equal to the distance of said car from the hinge connection of the partition of which it is a part.

12. An egg carton made from a single blank of paperboard comprising at least one six-egg unit having a front, a back, a cover, a bottom, a longitudinal partition and cross partitions, there being a pair of spaced full depth cross partitions and a pair of shallow cross partitions therebetween pivotally connected to said front and back, each of said full depth partitions having a pair of spaced, depending lugs that extend through slots in said bottom, one of said full depth partitions being pivoted to said front and back on a complex curved hinge formation, said longitudinal partition having arcuate openings there in adjacent said full depth partitions to permit rotation thereof from horizontal to generally vertical positions, said longitudinal partition comprising an upstanding hump rising between said shallow cross partitions and extending substantially to the underside of said cover, a pair of noses on said longitudinal partition extending toward said hump, each shallow cross partition lying between one 'tion, said hump having an opening therethrough with the bottom margin of said opening slightly above the pivotal connection of said shallow cross partitions, said opening being spaced from the, hinge connection of the shallow partition having said ear-a distance substantially equal to the distance of said ear from the hinge connectionofthe partition of which it is a part.

13. An egg carton made from a single blank of paperboard comprising at least one six-egg unit having a front, a back, a cover, a bottom, a longitudinal partition and cross partitions, there being a pair of spaced full depth cross partitions and a pair of shallow cross partitions therebetween pivotally connected to said front and back, each of said full depth partitions having a centrally positioned triangular aperture therein intermediate the height thereof and a pair of spaced, depending lugs that extend through slots in said bottom, one of said full depth partitions being pivoted to said front and back on a coinplex, curved hinge formation, said longitudinal partition having arcuate openings therein adjacent said full depth partitions to permit rotation thereof from horizontal to generallly vertical positions, a guiding point extending generally upwardly from said longitudinal partition adjacent each of said arcuate openings and in registry with the triangular aperture in the adjacent full depth partition, said longitudinal partition comprising an upstanding hump of a single thickness of material rising between said shallow cross partitions and extending substantially to the underside of said cover, a pair of noses on said longitudinal partition extending toward said hump, each shallow cross partition lying between one of said noses and said hump and engaged on opposite sides thereof by said hump and nose, one of saidshallow partitions having a slot therein receiving said longitudinal partition and having a margin of said slot in engagement with one side of said, longitudinal partition, the other one of said shallow, partitions having a slot therein receiving said longitudinal partition and means in engagement with a side of said longitudinal partition.

14. An egg carton made from a single blank of paperboard comprising at least one six-egg unit having a front, back, a cover, a bottom, a longitudinal partition comprising two layers of juxtaposed material and cross partitions, there being a pair of spaced full depth cross partitions and a pair of shallow cross partitions therebetween pivotally connected to said front and back, each of said full depth partitions having a pair of spaced, depending lugs of a single thickness of material that extend through slots in said bottom, said longitudinal partition having arcuate openings in the, upper edge thereof adjacent said full depth partitions to permit rotation thereof from horizontal to generally vertical positions, said longitudinal partition comprising an upstanding hump of a single thickness of material rising between said shal+ low cross partitions and extending substantially to the underside of said cover, a pair of noses of a single thickness of material on said longitudinal partition extending toward said hump, each shallow cross partition lying between one of said noses and said hump and engaged on opposite sides'thereof by edge portions of said hump and nose, one of said shallow partitions having a slot therein receiving said longitudinal partition and including a margin of said slot in engagement with oneside of said longitudinal partition, the other one of said shallow partitions having a slot therein receiving said longitudinal partition and means in engagement with a side of said longitudinal partitionl References Cited in the, file of this patent UNITED STATES PATENTS 2,277,327 Inman Mar. 24, 1942 2,387,314 Cox Oct. 23, 1945 2,533,340 Allen Dec. 12, 1950 2,556,088 lnman June 5, 1951- 2,605,951 Burger Aug, 5, 1952 2,675,159 Reiner Apr. 13, 1954 FOREIGN PATENTS 529,590 Canada Aug. 28, 1956 

